我面临 listview 的问题,即我在运行时对 ListViewItem 的某些视图进行膨胀,这导致 ListView 行的增加,即 listview 中的某些行具有不同的高度,而其他行具有不同的高度,这会导致错误的 getView 位置。
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.app.Activity;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView listView = (ListView) findViewById(R.id.listView1);
TestAdapter adapter = new TestAdapter(this);
listView.setAdapter(adapter);
}
public void onClickAction(View v){
v.findViewById(R.id.l1).setVisibility(View.VISIBLE);
}
}
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
public class TestAdapter extends BaseAdapter {
private String[] items = {"a","b","c","d","e","f","g","h","i"};
private Context context;
public TestAdapter(Context context) {
this.context = context;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return items.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return items[position];
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
ViewHolder holder;
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
if(convertView == null){
convertView = LayoutInflater.from(context).inflate(R.layout.list_view_item, null);
holder = new ViewHolder();
holder.textView = (TextView) convertView.findViewById(R.id.textView1);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
holder.textView.setText("value = "+position);
return convertView;
}
static class ViewHolder{
TextView textView;
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<ListView
android:id="@+id/listView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</ListView>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/mainLayout"
android:onClick="onClickAction"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<LinearLayout
android:id="@+id/l1"
android:layout_width="fill_parent"
android:layout_height="250dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView1"
android:visibility="gone"
android:background="@android:color/darker_gray"
android:orientation="vertical" >
</LinearLayout>
</RelativeLayout>